diff --git a/pyproject.toml b/pyproject.toml
index 0a5cf469..7e641b86 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -47,7 +47,8 @@ crypto = ["cryptography>=37.0.0"]
 gcpkms = ["google-cloud-kms"]
 pynacl = ["pynacl>1.2.0"]
 PySPX = ["PySPX==0.5.0"]
-hsm = ["asn1crypto", "cryptography", "PyKCS11"]
+asn1 = ["asn1crypto"]
+pykcs11 = ["PyKCS11"]
 
 [tool.setuptools]
 include-package-data = true